Does extreme submission often turn into aggression?

[dab_20]

She's still a pup really at only 1 yr old. She could still change a lot. You
say she used to bark a lot, but after socializing she stopped. How was she
socialized? What did they do with her?

Basically just meeting neighbor dogs on leash. There's a pug and another pittie that the neighbors have that she often runs around with. Had a few play dates with Springen.
She wasn't really socialized the first six months because she was very small and had some health problems including UTIs and skin conditions. They found her in a parking lot at around 5 weeks old!

Yes, she's the only dog. I just meant fear aggression towards other dogs. She LOVES people but is pretty submissive around them too.

Thanks for the replies! I'll talk to them about agility, I bet they'd be interested. She plays soccer with his younger brothers. She gets LOTS of activity because they are very active.

[luvofallhorses]

Well maybe get her into some kind of sport to boost her confidence like Dock dogs, flyball, or agility! If she sees other dogs doing stuff, she may not be so submissive.